Adding to the onslaught of vendor prototypes of wearable heads-up display models is Japan based Olympus with its Thursday announcement of the Meg4.0, a glasses mounted display—yes, it needs to be fitted on eyeglasses—with technology that Olympus hopes will differentiate it from other vendors' attempts. MEG4.0, a tiny wearable display weighing in at 30g, can be fitted on most glasses. The wearer connects it to a smartphone with GPS, via Bluetooth 2.1. The MEG4.0 comes with QVGA resolution (320×240) with a 10cd/m2 – 2,000 cd/m2 brightness, and built in accelerometer.